Science Knowings: JavaScript Course For Social Media

ES6+ Classes vs Prototype

ES6+ Classes vs. Prototypes

Welcome back! In this session, we'll explore the differences between ES6+ classes and prototypes, two fundamental concepts in JavaScript for creating and organizing code.

Introduction to Classes

ES6+ introduced classes as a syntactic sugar over prototypes, making it easier to define and work with object-oriented code.

Class Syntax

class Person {   constructor(name) {     this.name = name;   }   getName() {     return this.name;   } }

Class Properties

Class properties represent data associated with an object. They can be defined inside the class using either the constructor or the this keyword.

Class Methods

Class methods are functions defined inside the class. They can access and modify both the class properties and the object's own properties.

Constructor Method

The constructor method is a special method called when a new object is created. It's used to initialize the object's properties.

Inheritance in ES6+ Classes

Inheritance allows us to create new classes (child classes) that inherit properties and methods from existing classes (parent classes).

Dynamic Binding

Dynamic binding means the method that gets called is determined at runtime based on the type of object that is calling it.

Static Properties and Methods

Static properties and methods are associated with the class itself, not with individual objects.

Advantages of Classes

  • Syntactic sugar over prototypes
  • Cleaner and more concise code
  • Easier to reason about object-oriented code

Limitations of Classes

  • Can be more verbose for simple objects
  • Not as flexible as prototypes

Comparing Classes and Prototypes

FeatureClassesPrototypes
SyntaxSyntactic sugar over prototypesUse the prototype property
InheritanceBased on extends keywordUse the Object.create() method
BindingDynamic bindingStatic binding
FlexibilityLess flexibleMore flexible

When to Use Classes

  • When you need to create complex and reusable object-oriented code
  • When you want to take advantage of dynamic binding

When to Use Prototypes

  • When you need to create simple objects
  • When you need more flexibility in your code

Next Topic: Inheritance in ES6+ Classes

In the next session, we'll dive deeper into inheritance in ES6+ classes and explore how it can help you create more maintainable and extensible code. Follow us to continue learning!